Felipe Marin (Swinburne)
"WiggleZ survey: Constraining cosmic growth using alternative clustering method"
Abstract. The use of 2-point statistics (correlation functions and Power spectra) has been the common tool to analyse the galaxy distribution and obtain constraints on cosmological and galaxy formation models. But it does not contain all the information available from the galaxy field, and theoretical understanding combined with improved computation techniques allow us to include other statistics and observables to obtain additional constraints. In this talk I present results from the analysis of the WiggleZ 3-point correlation function, which measures the probability of finding triangles in the galaxy field; using this statistic we can constrain galaxy bias and estimate the cosmological growth function at different epochs. Secondly, I present preliminary results of constraints in the growth rate of structure combining clustering from the WiggleZ and BOSS surveys sharing the same volume, using the method of modelling redshift-space distortions. With the current surveys, applying these methods we estimate the evolution of cosmic growth, finding agreement with the predictions of the concordance LCDM universe. I will discuss the outlook for future surveys, where these methods promise to improve the power of prediction from galaxy surveys, in order to understand questions on the nature of dark energy and gravity models.
Held in the AAO Large Meeting Room (Room 1, Ground Floor, Building 3) at 11:00 AM on Thursday, 14 November 2013back